3. Launch Windows Explorer and delete all McAfee files in "Program Files" but especially in "C:\Document and Settings\<user>\Application Data" and "C:\Document and Settings\All Users\Application Data". You have to set Windows Explorer to show all hidden files and folders (Tools > Folder Options > View tab). Just delete the McAfee folders even if they are empty in all the "Application Data" folders. Can be more than one! In Vista: C:\Program Files, C:\ProgramData and C:\Users\yourname\AppData\Roaming If you can't find these files don't worry. It just means that MCPR has done its job.
4. Reboot and redownload/reinstall your McAfee products directly from your account at the McAfee web site.
If all the above doesn't help then use Technical Support Chat as they have the power toi escalate the issue to a higher level.
Lonely Tripper is doing his best but with everyone and their uncle jumping into the thread it is now very confusing.
These apply only to the home products. If any of you are using Enterprise products then this is the wrong section.